This update for python-bleach fixes the following issues:

- CVE-2021-23980: Fixed mutation XSS on bleach.clean with specific
  combinations of allowed tags (boo#1184547)

Update to 3.1.5:

* replace missing ``setuptools`` dependency with ``packaging``. Thank you Benjamin Peterson.

Update to 3.1.4 (boo#1168280, CVE-2020-6817):

* ``bleach.clean`` behavior parsing style attributes could result in a
  regular expression denial of service (ReDoS).
  Calls to ``bleach.clean`` with an allowed tag with an allowed
  ``style`` attribute were vulnerable to ReDoS. For example,
  ``bleach.clean(..., attributes={'a': ['style']})``.
* Style attributes with dashes, or single or double quoted values are
  cleaned instead of passed through.

update to 3.1.3 (boo#1167379, CVE-2020-6816):

* Add relative link to code of conduct. (#442)
* Drop deprecated 'setup.py test' support. (#507)
* Fix typo: curren -> current in tests/test_clean.py (#504)
* Test on PyPy 7
* Drop test support for end of life Python 3.4
* ``bleach.clean`` behavior parsing embedded MathML and SVG content
  with RCDATA tags did not match browser behavior and could result in
  a mutation XSS.
  Calls to ``bleach.clean`` with ``strip=False`` and ``math`` or
  ``svg`` tags and one or more of the RCDATA tags ``script``,
  ``noscript``, ``style``, ``noframes``, ``iframe``, ``noembed``, or
  ``xmp`` in the allowed tags whitelist were vulnerable to a mutation
  XSS.

This update was imported from the openSUSE:Leap:15.2:Update update project.